Island



. F. A'. STEVENS.

I OPHTHALMIC MOUNTING.

APPLICATION FILED DEC 8 1921 Reis'S'ued July 25, 1922.

FREDERICK ANSTEVENS, 0F PROVIDENCE, RI-IOIDE AND COMPANY, INCORPORATED, OF TIQN OF RHODE ISLAND.

PROVIDENCE, IRJIODE ISLAND,

ISLAND, AS SIGNOR T0 STEVENS A CORYORA- OPHTHALMIC ,MOUN'IING,

' Original No. 1,383,872, dated 'J'uly 5, 1321,-Seria1 No. 328,102, filed October 3, 1919.

issue filed December 8, 1921.. Serial No. 520,985.

' Toallwhom it may concern: v

Be it known that I, FREDERICK ARTHUR STEVENS, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island,'have in- .vented a new and useful Improvement in Ophthalmic Mountings, of which the followin is a specification.

y invention relates to devices for .lock ingslenses and the like against rotation in their f "ames'or mountings, such as the rims of spectacles and eyeglasses.

The objects of my invention are more particularly to improve the construction of spectacles, eye glasses and the like, whereby the lenses are locked against rotation in the rims, and looseness of the lenses in the rims is eliminated. y 1

With these objects inview, afeature of my invention contemplates the provision, in the lens-receiving groove of the lens rim, of a notch that extends but part way through the thickness of the rim. The lens is also provided with a registering notch. situated opposite to the notch in the rim. A separable element is removably mounted in the oppositely disposed notches to lock the lens against rotation in the groove. This locking element is preferably compressible, but is not necessarily so, and is conveniently and inexpensively of spherical or ball shape.

More specifically, a feature of my invention resides in the peculiar and novel construction of spectacles, eyeglasses and similar forms of ophthalmic mountings, in which the lenses are locked in the rims by a compressible locking member located in notches in the rims and lenses, whereby the lenses are locked in the rims by compressing the compressible locking member into the notches in the rims and lenses, in fastening the lenses in the rims.

In the drawings, illustrating one embodiment of the present invention, Figure 1 is an enlarged face view of the greater portion of a spectacle frame provided with my improved means for locking the lenses in the rims' Figs. 2, 3 and 4 are still further enlarged detail sectional views, Fig. 2 showing the rim separated from the lens, Fig. 3 showing the compressible locking member in place Specification of Reissued Letters Patent.

Beissued July 25, 1922.

Application for reard Fig. 4 showing the lens locked to the rim; and

Fig. 5 is an enlarged detail transverse sectional view through the rim and lens in the locked position. i

In'the drawings, 6 indicates a spectacle rim, connected to the usual bridge 7 and split end pieces 8, to which the usual temple 9 is pivotally secured, and 10 indicates the lens.

The rim 6 has the lens groove 11 in which is asmallsocket or notch 12, which may be semi-oval or of any other desired shape, and extending but part way through the thickness of the rim, as shownf The lens 10 has a similar notch 13 in its periphery corresponding to the notch 12 in the rim,

andis formed inltheperiphery of the lens opposite to the notch in the rim.

A separable or removable locking member 14, preferably spherical in shape, is constituted preferably of leader other suitable compressible material. Thelocking member 1.4 is of a size which,'when compressed, will practically fill the space formed by the notches 12 and 13, when the rim is closed onto the lens, insecuring the lens in the rim, by tightening the screw pieces 8 in the usual way. The locking member l l extends outwardly from the notch 12 in the rim 6 into the notch 13 in the lens 10. The notches 12 and 13 and the locking mem ber 14 constitute the lens-locking means.

In the use of spectacles and the like hav ing circular, rims and in which circular lenses are held in the rims by friction only, the lenses have a tendency to turn in the rims, from wiping or cleansing the lenses and fromother causes.

This is extremely detrimental, particularly so in cylindrical lenses. employed to correct astigmatism, as a slight turning movement of the lens in the frame will cause angular shifting of the cylindrical axis of the lens. This cylindrical axis is assumed to be parallel to the line 16, Fig. 1. Such shifting will destroy the astigmatic correction and will ruin the utility of the glasses until the fault is corrected.

In the use of my preferred improvement in ophthalmic mountings, a lens is locked in the rim, preferably by compressing a 15, in the split end t notch in :thevlens groove, acircular lens in .thejlens groove and groundon 1ts surface ness of the rim,

compressible locking member into registering notches in the lens and rim, 1n securmg the lens in the mm, in the usual way,

and looseness of the lenses in the rims is thereby eliminated.

It is evident that the may be located anywhere along the periphery of the rim, and a compressible locking member is preferable to accomplish this re- Having thus described my invention, I

claim as new 1. An ophthalmic mounting comprising a circular rim, a circular lens lll'l the rim and ground on its surface to correct visual defects of the e e and vcom ressible means intermediate the rim and thelens, for locking the lens Within the rim.

.2. An ophthalmic mounting comprising a circular trim having a 'lens groove and a to correct visual defects of theeye, and having aonotch in its .edge in oppositely disposecl relation to the notch iinthe rim, and acompressible lockingvmember intermediate .the notches in the rim. and the-lens, whereby, v.insecuringithe lens inthe rim, the

member is compressed into the notches in vthe rim and the lensthereby lockingthe lens locking Within the rim.

3.-Incombination, a lens vrim having a? lensfreceiving groove provlded wltha notch that extends but part Way through the thicka lens vin the groove pro vided with a notch registering with the groove, notch, .andalocking member freely point of locking,

'the sockets extending separable-from the rim removably imounted in both registering notches and engaging the walls of both notches to lock the lens "against rotation in sthe groove.

34. An ophthalmic mounting comprising a lens r m having .a lens-receiving. groove provided with a notch that extends but part way-through the thickness of the rim and that is adapted to removably receive a lockto lie ,also in a registering notch of a'lens that is adapted tobe received in the groove,

and the locking member being adapted --to engage the walls of both notchestovlock the lens against rotation in the groove.

5. An ophthalmic mountingcomprisinga lens rim having alens-receiving groove provided with a notch ,thatextends .butfpart way through the thickness ,of the I rim", and that is adapted to receive,a;ballvadaptedto engage a lens, thereby to flock ,the lens vagainst rotationinthe groove. i o

, 6.111 an ophthalmic mounting, lens rims provided with sockets,oand ballsores'ting in outwardly jfrom the rims 'forpengagement withlenses.

7. In anophthalmic mounting, circular lens rimsghaving internalperipheral grooves and provided "with vsockets within the grooves, and balls resting in ithesockets adapted to engage notches in theilensesr In testimony whereof, I have hereunto ber,,1 921. I p

FREDER C A. v

mg member that is freely separable ,from the rim, the lockingmember being adapted e710 subscribed mynamethis21st day of Novem- 

